After the DV Mega, the DV4 Mini was the next major product on the market and were very popular. Both UHF and VHF models were available. They were available via most local vendors however they don’t seem to be available anymore possibly due to connectivity issues with the Brandmeister network for which there may be a work around available.
I’ve not managed to locate much information on these units since they went off the UK market except that there may be an updated version available outside of the UK.
Download Centre – http://112.xreflector.es/Soft_DV4MINI/DV4_Control_Center/
Other Information – http://xreflector.net/Download/DV4mini/inhalt.html